Wear factor (K) is an indication of a materials resistance to wear as a function of the volume of material lost, force (load) and velocity at the wear interface and time. It is often determined using a “thrust washer” wear testing apparatus per ASTM D3702 in which a molded plastic specimen is rotated against a substrate thrust washer under set pressure and velocity conditions.
A wear factor is calculated with the equation W=K*F*V*T. In this equation W is wear volume (mm3), K is wear factor (mm3/N m)10-8, F is force (N), V is velocity (m/sec), and T is elapsed time (sec).
A material with a lower wear factor (K) has greater resistance to wear and these values are useful for material comparison purposes.
[ View nylon 6/6 wear data in english units | Return to wear data resin system list ]
Plastic vs Plastic
| Test Conditions
PV 35 Load 0.90 Speed 0.25 |
|||||
|---|---|---|---|---|---|
| Rotating Sample | vs | Stationary Sample | µ Dynamic |
||
| RTP Product | Wear
Factor |
RTP Product | Wear
Factor |
||
|
PA 6/6 Unfilled |
172 | vs |
PA 6/6 Unfilled |
161 | 0.11 |
|
PA 6/6 Unfilled |
741 | vs |
POM Unfilled |
191 | 0.38 |
|
PA 6/6 Unfilled |
236 | vs |
POM PFPE Lubricated PTFE Lubricated |
26 | 0.29 |
|
PA 6/6 20% PTFE |
128 | vs |
PC 30% Glass Fiber |
83 | 0.09 |
|
PA 6/6 20% PTFE |
206 | vs |
PC 30% Glass Fiber |
66 | 0.10 |
|
PA 6/6 20% PTFE |
59 | vs |
PA 6/6 15% PTFE 30% Glass Fiber |
57 | 0.09 |
|
PA 6/6 20% PTFE |
201 | vs |
PA 6/6 30% Glass Fiber |
22 | 0.13 |
|
PA 6/6 20% PTFE |
83 | vs |
PA 6/6 20% PTFE |
78 | 0.16 |
|
PA 6/6 20% PTFE |
235 | vs |
PC 15% PTFE |
96 | 0.19 |
|
PA 6/6 20% PTFE |
63 | vs |
POM 20% PTFE |
32 | 0.30 |
|
PA 6/6 30% Glass Fiber |
57 | vs |
PA 6/6 30% Glass Fiber |
146 | 0.27 |
|
PA 6/6 30% Glass Fiber |
111 | vs |
PA 6/6 30% Glass Fiber 15% PTFE |
102 | 0.25 |
|
PA 6/6 30% Glass Fiber |
1796 | vs |
PC 30% Glass Fiber |
1971 | 0.26 |
|
PA 6/6 30% Glass Fiber |
649 | vs | RTP 805 CC
POM 30% Glass Fiber Chemically Coupled |
1757 | 0.41 |
|
PA 6/6 30% Glass Fiber |
49 | vs |
POM 20% PTFE |
24 | .013 |
|
PA 6/6 30% Glass Fiber 15% PTFE |
16 | vs |
PA 6/6 30% Glass Fiber 15% PTFE |
16 | 0.10 |
|
PA 6/6 30% Glass Fiber 15% PTFE |
45 | vs |
PA 6/6 20% PTFE |
201 | 0.19 |
|
PA 6/6 30% Glass Fiber 15% PTFE |
12 | vs |
POM 20% PTFE |
32 | 0.10 |
|
PA 6/6 30% Glass Fiber 15% PTFE |
86 | vs |
PA 6/6 30% Carbon Fiber 15% PTFE |
236 | 0.15 |
|
PA 6/6 30% Carbon Fiber |
295 | vs |
PA 6/6 30% Glass Fiber |
309 | 0.34 |
|
PA 6/6 30% Carbon Fiber |
106 | vs |
PA 6/6 30% Carbon Fiber 15% PTFE |
84 | 0.25 |
|
PA 6/6 30% Carbon Fiber |
241 | vs | RTP 285 TFE 15 SI 2
PA 6/6 30% Carbon Fiber 15% PTFE 2% Silicone |
352 | 0.25 |
|
PA 6/6 30% Carbon Fiber 15% PTFE |
102 | vs |
PA 6/6 30% Glass Fiber 15% PTFE |
16 | 0.18 |
|
PA 6/6 30% Carbon Fiber 15% PTFE |
231 | vs |
PA 6/6 30% Carbon Fiber 15% PTFE |
216 | 0.27 |
|
PA 6/6 30% Carbon Fiber 15% PTFE |
129 | vs |
PA 6/6 30% Glass Fiber |
159 | 0.21 |
|
PA 6/6 30% Carbon Fiber 13% PTFE 2% Silicone |
271 | vs |
PA 6/6 30% Carbon Fiber 13% PTFE 2% Silicone |
204 | 0.21 |
|
PA 6/6 PFPE Lubricated PTFE Lubricated |
105 | vs |
POM 20% PTFE |
28 | 0.30 |
|
PA 6/6 PFPE Lubricated PTFE Lubricated |
68 | vs |
POM PFPE Lubricated PTFE Lubricated |
109 | 0.22 |
|
PA 6/6 PFPE Lubricated PTFE Lubricated |
215 | vs |
POM PTFE Lubricated Silicone Lubricated UL94 HB |
43 | 0.06 |
- Thrust washer testing conducted per ASTM D 3702
- Wear Factor: (mm3/N m)10-8
- PV: KPa m/sec
- Load: N
- Speed: m/sec
Plastic vs Steel
| RTP Product | Tested vs. Steel (1018 C) | |||||
|---|---|---|---|---|---|---|
| PV 70
Load 1.80 Speed 0.25 |
PV 175
Load 2.25 Speed 0.50 |
PV 350
Load 9.00 Speed 0.25 |
||||
| Wear Factor |
µ Dynamic |
Wear Factor |
µ Dynamic |
Wear Factor |
µ Dynamic |
|
|
Unfilled PA 6/6 |
1811 | 0.66 | 191 | 0.91 | 384 | 0.60 |
|
2% Silicone |
1284 | 0.54 | 364 | 0.78 | 171 | 0.77 |
|
10% PTFE |
685 | 0.41 | 342 | 0.41 | 314 | 0.29 |
|
20% PTFE |
193 | 0.27 | 22 | 0.18 | ||
|
18% PTFE 2% Silicone |
22 | 0.20 | 119 | 0.36 | 36 | 0.19 |
|
30% Glass Fiber 15% PTFE |
84 | 0.50 | 199 | 0.77 | 261 | 0.42 |
|
30% Carbon Fiber 15% PTFE |
72 | 0.35 | 107 | 0.31 | 169 | 0.59 |
|
15% Aramid Fiber 15% PTFE |
225 | 0.39 | 64 | 0.44 | 298 | 0.39 |
|
PFPE Lubricated PTFE Lubricated |
34 | 0.44 | 88 | 0.39 | 181 | 0.27 |
- Thrust washer testing conducted per ASTM D 3702
- Wear Factor: (mm3/N m)10-8
- PV: KPa m/sec
- Load: N
- Speed: m/sec
Comparing competitive data note
RTP Company reports Wear Factors per unit Force (KF) with units of (mm3/N m)10-8. This is the industry standard way to calculate and report Wear Factor. Some suppliers report Wear Factors per unit Pressure (KP) with units of (mm3/Pa m)10-11. This value is arrived at by dividing the KF by the contact surface of the test specimen 0.00023 or 2.3-4 m2. As result of this reporting discrepency, RTP Company’s Wear Factor values appear to be significantly higher. For example a KP of 3 (mm3/Pa m)10-11 would be equal to KF of 3/0.00023 = 13 (mm3/N m)10-8.
No information supplied by RTP Company constitutes a warranty regarding product performance or use. Any information regarding performance or use is only offered as suggestion for investigation for use, based upon RTP Company or other customer experience. RTP Company makes no warranties, expressed or implied, concerning the suitability or fitness of any of its products for any particular purpose. It is the responsibility of the customer to determine that the product is safe, lawful and technically suitable for the intended use. The disclosure of information herein is not a license to operate under, or a recommendation to infringe any patents.
